using DOAN.Model.BZFM;
using DOAN.Model.BZFM.Dto;
using DOAN.Model.Mobile.Dto;
using DOAN.Repository;
using DOAN.Service.BZFM.IBZFMService;
using Infrastructure.Attribute;
using Infrastructure.Extensions;
using Microsoft.AspNetCore.Http;
using Microsoft.IdentityModel.Tokens;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;

namespace DOAN.Service.BZFM
{
    /// <summary>
    /// 库存表Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IMmInventoryService), ServiceLifetime = LifeTime.Transient)]
    public class MmInventoryService : BaseService<MmInventory>, IMmInventoryService
    {
        /// <summary>
        /// 查询库存表列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<MmInventoryDto> GetList(MmInventoryQueryDto parm)
        {
            var predicate = QueryExp(parm);

            var response = Queryable()
                .Where(predicate.ToExpression())
                .ToPage<MmInventory, MmInventoryDto>(parm);

            return response;
        }

        /// <summary>
        /// 获取详情
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public MmInventory GetInfo(int Id)
        {
            var response = Queryable().Where(x => x.Id == Id).First();

            return response;
        }

        /// <summary>
        /// 添加库存表
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public MmInventory AddMmInventory(MmInventory model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改库存表
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateMmInventory(MmInventory model)
        {
            return Update(model, true);
        }

        /// <summary>
        /// 查询导出表达式
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        private static Expressionable<MmInventory> QueryExp(MmInventoryQueryDto parm)
        {
            var predicate = Expressionable
                .Create<MmInventory>()
                .AndIF(
                    !string.IsNullOrEmpty(parm.MaterialCode),
                    m => m.MaterialCode.Contains(parm.MaterialCode)
                )
                .AndIF(
                    !string.IsNullOrEmpty(parm.WarehouseName),
                    m => m.WarehouseName.Contains(parm.WarehouseName)
                )
                .AndIF(
                    !string.IsNullOrEmpty(parm.WarehouseCode),
                    m => m.WarehouseCode.Contains(parm.WarehouseCode)
                )
                .AndIF(
                    !string.IsNullOrEmpty(parm.LocationCode),
                    m => m.LocationCode.Contains(parm.LocationCode)
                )
                .AndIF(
                    !string.IsNullOrEmpty(parm.SupplierCode),
                    m => m.SupplierCode.Contains(parm.SupplierCode)
                )
                .AndIF(
                    !string.IsNullOrEmpty(parm.SupplierName),
                    m => m.SupplierName.Contains(parm.SupplierName)
                )
                .AndIF(!string.IsNullOrEmpty(parm.BatchNo), m => m.BatchNo.Contains(parm.BatchNo));

            return predicate;
        }

        public List<MmMaterialOption> GetMaterialOption()
        {
            try
            {
                return Context
                    .Queryable<MmMaterial>()
                    .Where(it => it.Status == "启用")
                    .Select(it => new MmMaterialOption
                    {
                        Id = it.Id,
                        MaterialCode = it.MaterialCode,
                        MaterialName = it.MaterialName,
                        CategoryCode = it.CategoryCode,
                        Specification = it.Specification,
                        SupplierCode = it.SupplierCode,
                        SupplierName = it.SupplierName,
                        Type = it.Type,
                    })
                    .OrderBy(it => it.Type)
                    .ToList();
            }
            catch (Exception)
            {
                throw;
            }
        }

        public List<MmLocationOption> GetLocationOption()
        {
            try
            {
                return Context
                    .Queryable<MmLocation>()
                    .Where(it => it.Status == "启用")
                    .Select(it => new MmLocationOption
                    {
                        Id = it.Id,
                        WarehouseCode = it.WarehouseCode,
                        WarehouseName = it.WarehouseName,
                        LocationCode = it.LocationCode,
                        LocationName = it.LocationName,
                        LocationType = it.LocationType,
                    })
                    .ToList();
            }
            catch (Exception)
            {
                throw;
            }
        }

        public List<MmTransactionOption> GetTransactionOption()
        {
            try
            {
                return Context
                    .Queryable<MmTransactionType>()
                    .Where(it => it.Status == "启用")
                    .Select(it => new MmTransactionOption
                    {
                        Label = it.TypeName,
                        Value = it.TypeCode,
                    })
                    .ToList();
            }
            catch (Exception)
            {
                throw;
            }
        }

        public string CreateInboundReceipt(InboundReceiptDto parm)
        {
            try
            {
                DateTime nowDate = DateTime.Now;

                // 计算有符号变动量（蓝单为正，红单为负）
                decimal delta = GetSignedQuantity(parm.ReceiptType, parm.Quantity);

                // 校验物料和库位
                var mmMaterial = Context
                    .Queryable<MmMaterial>()
                    .Where(it => it.MaterialCode == parm.MaterialCode)
                    .WhereIF(
                        !string.IsNullOrEmpty(parm.SupplierCode),
                        it => it.SupplierCode == parm.SupplierCode
                    )
                    .First();
                if (mmMaterial == null)
                    return "物料不存在!";

                var mmLocation = Context
                    .Queryable<MmLocation>()
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();
                if (mmLocation == null)
                    return "仓库编码或库位编码不存在!";

                // 启用事务
                Context.Ado.BeginTran();

                // 获取现有库存（同物料、批次、库位、供应商）
                var mmInventory = Context
                    .Queryable<MmInventory>()
                    .Where(it => it.MaterialCode == parm.MaterialCode)
                    .Where(it => it.BatchNo == parm.BatchNo)
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .Where(it => it.SupplierCode == parm.SupplierCode)
                    .First();

                // 若不存在则新增；存在则更新
                if (mmInventory == null)
                {
                    var newInventory = new MmInventory()
                    {
                        MaterialCode = mmMaterial.MaterialCode,
                        MaterialName = mmMaterial.MaterialName,
                        SupplierCode = mmMaterial.SupplierCode,
                        SupplierName = mmMaterial.SupplierName,
                        LocationCode = mmLocation.LocationCode,
                        LocationName = mmLocation.LocationName,
                        WarehouseCode = mmLocation.WarehouseCode,
                        WarehouseName = mmLocation.WarehouseName,
                        BatchNo = parm.BatchNo,
                        CurrentQty = delta,
                        Unit = parm.Unit,
                        ExpiryDate = parm.ExpiryDate,
                        LastUpdatedTime = null,
                        ProductionDate = parm.ProductionDate,
                        CreatedTime = nowDate,
                    };
                    Context.Insertable(newInventory).ExecuteCommand();
                }
                else
                {
                    mmInventory.CurrentQty += delta;
                    Context
                        .Updateable(mmInventory)
                        .UpdateColumns(it => it.CurrentQty)
                        .ExecuteCommand();
                }

                // 插入入库记录，入库单号使用自动增长策略（同日期按序号）
                var inboundNo = GenerateReceiptNo("RK");
                MmRecordInbound newRecord = new()
                {
                    InboundNo = inboundNo,
                    BatchNo = parm.BatchNo,
                    Operator = parm.Operator,
                    StoveCode = parm.StoveCode,
                    MaterialCode = mmMaterial.MaterialCode,
                    MaterialName = mmMaterial.MaterialName,
                    SupplierCode = mmMaterial.SupplierCode,
                    SupplierName = mmMaterial.SupplierName,
                    LocationCode = mmLocation.LocationCode,
                    LocationName = mmLocation.LocationName,
                    WarehouseCode = mmLocation.WarehouseCode,
                    WarehouseName = mmLocation.WarehouseName,
                    //TODO 待调整（可能涉及记录汇总）
                    Quantity = delta,
                    Unit = parm.Unit,
                    ProductionDate = parm.ProductionDate,
                    ExpiryDate = parm.ExpiryDate,
                    CreatedTime = nowDate,
                    TransactionType = parm.TransactionType,
                    Remarks = parm.Remarks,
                };
                Context.Insertable(newRecord).ExecuteCommand();

                Context.Ado.CommitTran();
                return "ok";
            }
            catch (Exception ex)
            {
                // 回滚操作
                Context.Ado.RollbackTran();
                return ex.Message;
            }
        }

        public string CreateOutboundReceipt(OutboundReceiptDto parm)
        {
            try
            {
                DateTime nowDate = DateTime.Now;

                // 计算有符号变动量（蓝单为正，红单为负）
                decimal delta = GetSignedQuantity(parm.ReceiptType, parm.Quantity);

                var mmMaterial = Context
                    .Queryable<MmMaterial>()
                    .Where(it => it.MaterialCode == parm.MaterialCode)
                    .First();
                if (mmMaterial == null)
                    return "物料不存在!";

                var mmLocation = Context
                    .Queryable<MmLocation>()
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();
                if (mmLocation == null)
                    return "仓库编码或库位编码不存在!";

                Context.Ado.BeginTran();

                var mmInventory = Context
                    .Queryable<MmInventory>()
                    .Where(it => it.MaterialCode == parm.MaterialCode)
                    .Where(it => it.BatchNo == parm.BatchNo)
                    .Where(it => it.WarehouseCode == parm.WarehouseCode)
                    .Where(it => it.LocationCode == parm.LocationCode)
                    .First();

                if (mmInventory == null)
                {
                    var newInventory = new MmInventory()
                    {
                        MaterialCode = mmMaterial.MaterialCode,
                        MaterialName = mmMaterial.MaterialName,
                        LocationCode = mmLocation.LocationCode,
                        LocationName = mmLocation.LocationName,
                        WarehouseCode = mmLocation.WarehouseCode,
                        WarehouseName = mmLocation.WarehouseName,
                        BatchNo = parm.BatchNo,
                        CurrentQty = -delta,
                        Unit = parm.Unit,
                        LastUpdatedTime = null,
                        CreatedTime = nowDate,
                    };
                    Context.Insertable(newInventory).ExecuteCommand();
                }
                else
                {
                    if (mmInventory.CurrentQty - delta < 0)
                    {
                        Context.Ado.RollbackTran();
                        return "库存不足，无法出库";
                    }
                    mmInventory.CurrentQty -= delta;
                    Context
                        .Updateable(mmInventory)
                        .UpdateColumns(it => it.CurrentQty)
                        .ExecuteCommand();
                }

                var outboundNo = GenerateReceiptNo("CK");
                MmRecordOutbound newRecord = new()
                {
                    OutboundNo = outboundNo,
                    BatchNo = parm.BatchNo,
                    Operator = parm.Operator,
                    MaterialCode = mmMaterial.MaterialCode,
                    MaterialName = mmMaterial.MaterialName,
                    LocationCode = mmLocation.LocationCode,
                    LocationName = mmLocation.LocationName,
                    WarehouseCode = mmLocation.WarehouseCode,
                    WarehouseName = mmLocation.WarehouseName,
                    //TODO 待调整（可能涉及记录汇总）
                    Quantity = -delta,
                    Unit = parm.Unit,
                    CreatedTime = nowDate,
                    TransactionType = parm.TransactionType,
                    Remarks = parm.Remarks,
                };
                Context.Insertable(newRecord).ExecuteCommand();
                Context.Ado.CommitTran();
                return "ok";
            }
            catch (Exception ex)
            {
                // 回滚操作
                Context.Ado.RollbackTran();
                return ex.Message;
            }
        }

        /// <summary>
        /// 根据单据类型与数量计算有符号变动量（蓝单为正，红单为负）
        /// </summary>
        /// <param name="receiptType">1 表示蓝单（正），其它为红单（负）</param>
        /// <param name="quantity">1 表示蓝单（正），其它为红单（负）</param>
        private static decimal GetSignedQuantity(int receiptType, decimal quantity)
        {
            return receiptType == 1 ? Math.Abs(quantity) : -Math.Abs(quantity);
        }

        /// <summary>
        /// 生成单据编号，格式：{prefix}{yyyyMMdd}-{nnn}
        /// 例如：RK20251225-001
        /// </summary>
        private string GenerateReceiptNo(string prefix)
        {
            var datePart = DateTime.Now.ToString("yyyyMMdd");
            var baseNo = prefix + datePart + "-";

            // 尝试从入库/出库表中获取当天最大的编号后缀
            try
            {
                if (prefix == "RK")
                {
                    var last = Context
                        .Queryable<MmRecordInbound>()
                        .Where(it => it.InboundNo.StartsWith(prefix + datePart))
                        .OrderBy(it => it.InboundNo + " desc")
                        .Select(it => it.InboundNo)
                        .First();
                    if (string.IsNullOrEmpty(last))
                    {
                        return baseNo + "001";
                    }
                    var suf = last.Substring((prefix + datePart).Length).TrimStart('-', '_');
                    if (int.TryParse(suf, out var n))
                    {
                        return baseNo + (n + 1).ToString("D3");
                    }
                    return baseNo + "001";
                }
                else
                {
                    var last = Context
                        .Queryable<MmRecordOutbound>()
                        .Where(it => it.OutboundNo.StartsWith(prefix + datePart))
                        .OrderBy(it => it.OutboundNo + " desc")
                        .Select(it => it.OutboundNo)
                        .First();
                    if (string.IsNullOrEmpty(last))
                    {
                        return baseNo + "001";
                    }
                    var suf = last.Substring((prefix + datePart).Length).TrimStart('-', '_');
                    if (int.TryParse(suf, out var n))
                    {
                        return baseNo + (n + 1).ToString("D3");
                    }
                    return baseNo + "001";
                }
            }
            catch
            {
                return baseNo + "001";
            }
        }

        /// <summary>
        /// 导入数据
        /// </summary>
        /// <param name="formFile"></param>
        /// <returns></returns>
        public ImportResultDto ImportInventory(IFormFile formFile, string username)
        {
            string message = "导入成功";
            List<MmInventoryExcelDto> inventoryList = new();
            using (var stream = formFile.OpenReadStream())
            {
                try
                {
                    IWorkbook workbook = new XSSFWorkbook(stream);
                    ISheet sheet = workbook.GetSheetAt(0);

                    #region 读取excel

                    // 遍历每一行
                    for (int row = 1; row <= sheet.LastRowNum; row++)
                    {
                        IRow currentRow = sheet.GetRow(row);
                        if (currentRow != null) // 确保行不为空
                        {
                            MmInventoryExcelDto inventory = new MmInventoryExcelDto();

                            //00 ID
                            NPOI.SS.UserModel.ICell currentCell_00 = currentRow.GetCell(0);
                            inventory.Id = (int)currentCell_00?.NumericCellValue;

                            //02物料编码
                            NPOI.SS.UserModel.ICell currentCell_01 = currentRow.GetCell(1);
                            inventory.MaterialCode = currentCell_01?.ToString();
                            if (
                                currentCell_01 == null
                                || string.IsNullOrEmpty(inventory.MaterialCode)
                            )
                            {
                                message = $"物料编码不可为空，第{row + 1}行";
                                break;
                            }

                            //03批次号
                            NPOI.SS.UserModel.ICell currentCell_02 = currentRow.GetCell(2);
                            inventory.BatchNo = currentCell_02?.ToString() ?? string.Empty;

                            //04当前库存量
                            NPOI.SS.UserModel.ICell currentCell_03 = currentRow.GetCell(3);
                            string currentQtyStr = currentCell_03?.ToString();

                            if (currentCell_03 == null || string.IsNullOrWhiteSpace(currentQtyStr))
                            {
                                message = $"当前库存量不可为空，第{row + 1}行";
                                break;
                            }

                            // 尝试转换为decimal
                            if (!decimal.TryParse(currentQtyStr, out decimal currentQty))
                            {
                                message = $"当前库存量格式错误（必须是数字），第{row + 1}行";
                                break;
                            }

                            // 验证数值范围（可根据业务需求调整）
                            //if (currentQty < 0)
                            //{
                            //    message = $"当前库存量不能为负数，第{row + 1}行";
                            //    break;
                            //}
                            inventory.CurrentQty = currentQty;

                            //05 仓库编码
                            NPOI.SS.UserModel.ICell currentCell_04 = currentRow.GetCell(4);
                            inventory.WarehouseCode = currentCell_04?.ToString();
                            if (
                                currentCell_04 == null
                                || string.IsNullOrEmpty(inventory.WarehouseCode)
                            )
                            {
                                message = $"仓库编码不可为空，第{row + 1}行";
                                break;
                            }

                            //06 仓库名称
                            NPOI.SS.UserModel.ICell currentCell_05 = currentRow.GetCell(5);
                            inventory.WarehouseName = currentCell_05?.ToString();
                            if (
                                currentCell_05 == null
                                || string.IsNullOrEmpty(inventory.WarehouseName)
                            )
                            {
                                message = $"仓库名称不可为空，第{row + 1}行";
                                break;
                            }

                            //07 库位编码
                            NPOI.SS.UserModel.ICell currentCell_06 = currentRow.GetCell(6);
                            inventory.LocationCode = currentCell_06?.ToString();
                            if (
                                currentCell_06 == null
                                || string.IsNullOrEmpty(inventory.LocationCode)
                            )
                            {
                                message = $"仓库编码不可为空，第{row + 1}行";
                                break;
                            }

                            //08 库位名称
                            NPOI.SS.UserModel.ICell currentCell_07 = currentRow.GetCell(7);
                            inventory.LocationName = currentCell_07?.ToString();
                            if (
                                currentCell_07 == null
                                || string.IsNullOrEmpty(inventory.LocationName)
                            )
                            {
                                message = $"库位名称不可为空，第{row + 1}行";
                                break;
                            }

                            //09 创建时间
                            NPOI.SS.UserModel.ICell currentCell_08 = currentRow.GetCell(8);
                            inventory.CreatedTime = currentCell_08?.DateCellValue ?? DateTime.Now;

                            inventoryList.Add(inventory);
                        }
                    }

                    #endregion
                }
                catch (Exception ex)
                {
                    return null;
                }
            }
            // TODO 3.调用SplitInsert方法实现导入操作,注意主键列的配置(建议优化为，ID相同则修改，不同则新增)

            var x = Context
                .Storageable(inventoryList)
                //.SplitInsert(it => !it.Any())
                //.WhereColumns(it => it.Id) //如果不是主键可以这样实现（多字段it=>new{it.x1,it.x2}）
                .ToStorage();
            var result = x.AsInsertable.ExecuteCommand();
            var result2 = x.AsUpdateable.IgnoreColumns(ignoreAllNullColumns: true).ExecuteCommand(); //插入可插入部分;

            var importResult = new ImportResultDto
            {
                Message = message,
                Inserted = x.InsertList.Count,
                Updated = x.UpdateList.Count,
                ErrorCount = x.ErrorList.Count,
                IgnoredCount = x.IgnoreList.Count,
                Deleted = x.DeleteList.Count,
                Total = x.TotalList.Count,
            };
            //输出统计
            Console.WriteLine(importResult);
            // 4.收集错误与忽略信息，返回导入结果ImportResultDto 提示，需要修改IServer相关返回格式
            foreach (var item in x.ErrorList)
            {
                importResult.Errors.Add(
                    new ImportErrorDto
                    {
                        MaterialCode = item.Item.MaterialCode,
                        Message = item.StorageMessage,
                    }
                );
            }
            foreach (var item in x.IgnoreList)
            {
                importResult.Ignored.Add(
                    new ImportErrorDto
                    {
                        MaterialCode = item.Item.MaterialCode,
                        Message = item.StorageMessage,
                    }
                );
            }

            return importResult;
        }

        /// <summary>
        /// 导出物料表列表
        /// </summary>
        /// <returns></returns>
        public PagedInfo<MmInventoryExcelDto> SelectInventoryList(
            MmInventoryQueryDto inventory,
            PagerInfo pager
        )
        {
            // Use the same predicate builder as GetList to support consistent filtering
            var predicate = QueryExp(inventory);

            var query = Queryable()
                .Where(predicate.ToExpression())
                .Select(it => new MmInventoryExcelDto
                {
                    Id = it.Id,
                    MaterialCode = it.MaterialCode,
                    BatchNo = it.BatchNo,
                    CurrentQty = it.CurrentQty,
                    WarehouseCode = it.WarehouseCode,
                    WarehouseName = it.WarehouseName,
                    LocationCode = it.LocationCode,
                    LocationName = it.LocationName,
                    CreatedTime = it.CreatedTime,
                });

            return query.ToPage(pager);
        }
    }
}